Covestro FAQ: Innovation vs. Dow Chemical, Epoxy Resin Applications, Conformal Coating For PCBs, Powder Coating vs Paint

I'm a technical service engineer at Covestro, and most of my day looks like triage. A customer calls because a production line stopped. A material spec needs verification in the next few hours. A delivery deadline moved up by two weeks and someone needs to know whether a faster cure will work. I've taken more than 600 of those calls in eight years—including same-day turnarounds for electronics manufacturers and industrial coating formulators.

The questions that come in follow patterns. So instead of answering them one call at a time, I've written them down. If you're evaluating Covestro as a materials supplier or choosing between coating technologies, this is what I'd tell you on the phone.

1. What does Covestro actually make?
2. How do I find product information on Covestro's official website?
3. How does Covestro's innovation ranking compare to Dow Chemical?
4. What are epoxy resins used for, and when should I pick something else?
5. What is conformal coating on a PCB, and how do I choose the right one?
6. What's the actual difference between powder coating and paint?
7. What should I have ready before placing an urgent coating-material order?

1. What does Covestro actually make?

Covestro produces the raw materials that go into coatings, adhesives, films, and plastics. The two main chemistry platforms are polyurethanes and polycarbonates. If you've ever used a two-component polyurethane coating or handled a polycarbonate sheet in a machine guard, you've touched Covestro material.

We spun off from Bayer in 2015, so we're a young company with decades of polymer history behind us. Today the materials go into automotive parts, medical devices, electronics, and building insulation.

What we're not is a paint or coating manufacturer. Covestro doesn't sell finished conformal coatings or ready-to-spray powder coating. We sell the polymer chemistry—polyisocyanates, polyols, specialty films—that coating formulators use in their own products. That distinction matters more than people think. When you evaluate Covestro, you're not looking at a can of finish. You're looking at the building blocks behind it.

2. How do I find product information on Covestro's official website?

The Covestro official website at covestro.com is built for engineers. You'll find technical datasheets, safety data sheets, and application notes organized by industry and product family. The product finder is the first thing I recommend to anyone evaluating our materials—filter by chemistry platform and application, and you'll have a starting point in minutes.

That said, the website has limits. If you're asking whether a specific polyol will work with a hardener in your process, the answer usually is "it depends"—on your formulation, your substrate, your cure conditions. Those questions don't resolve well over a product page. They resolve over the phone with someone who has seen the failure modes.

If you're researching innovation and sustainability, the Sustainability section of covestro.com documents our circular economy commitments and the share of new products with measurable sustainability benefits. That's the same data I'd share in a vendor presentation—except you can access it without scheduling a call with me.

3. How does Covestro's innovation ranking compare to Dow Chemical?

This comes up in every vendor evaluation, and my answer is the same: it depends on what you're measuring.

Dow Chemical is a much larger company with a broader portfolio, so their absolute R&D budget is higher. If "innovation ranking" means total money spent on research, Dow wins that comparison every time.

But if you're buying coating raw materials or polymer chemistry, corporate R&D spend isn't the metric that matters. What matters is innovation activity in your specific product category. Covestro concentrates its R&D in fewer areas—polyurethane and polycarbonate chemistry—and that focus generates depth. Don't hold me to the latest figures, but Covestro's public reporting shows the share of revenue from products with sustainability benefits growing consistently year over year. In my opinion, that's a more meaningful innovation measure than a headline ranking.

If you want to verify it yourself: search the European Patent Office database for recent filings in polyurethane and polycarbonate categories. Look at who is filing, and in what volume. You'll have a clearer picture than any list can give you.

4. What are epoxy resins used for, and when should I pick something else?

Epoxy resins are a cornerstone of industrial materials. Structural adhesives, marine coatings, industrial flooring, electrical laminates, composites—epoxy is the backbone. It cures hard, bonds aggressively, and resists chemicals. If you've used a metal adhesive that set in minutes, you've used epoxy.

Here's where I'll be direct. Covestro doesn't sell epoxy resin. It's not our chemistry platform. When a customer asks me for epoxy, I don't pretend we're the best source. I'll point you to a supplier whose core business is epoxy. That honest move earns more trust than "our product is also... something."

What I'll also tell you: epoxy is often chosen out of habit, not performance need. If your part must absorb impact or flex without cracking, a polyurethane system generally outperforms epoxy. If you need UV stability and optical clarity, polycarbonate beats both. The right chemistry matches your substrate, your environment, and your manufacturing process.

A toolmaker once told me: "I buy capability, not chemistry." That changed how I think about material recommendations. You're not buying a polymer—you're buying performance.

5. What is conformal coating on a PCB, and how do I choose the right one?

Conformal coating is a thin polymer layer applied to a printed circuit board. "Conformal" means it covers every contour—components, solder joints, traces—following the board's shape. Its job is protecting the board from moisture, dirt, chemicals, and vibration. An unprotected PCB exposed to humidity can corrode within months.

The main coating chemistries are acrylic, silicone, polyurethane, and epoxy:

• Acrylic — easy to apply and rework, but lower chemical resistance.
• Silicone — survives high temperatures, but soft and harder to process.
• Polyurethane — excellent chemical and abrasion resistance; this is where Covestro's raw materials show up.
• Epoxy — strong adhesion and a solid moisture barrier, but very difficult to rework.

The mistake I see most often is choosing the chemistry before checking the board's real environment. Thermal cycling matters. A board in a car door experiences different expansion stress than a board in a greenhouse controller. In March 2024, a customer called about failed conformal coating on a batch of boards. They assumed the material was the problem. It wasn't—the boards had been improperly cleaned before coating. The downtime cost them around $18,000.

The lesson I've taken from that and similar calls: don't ask "which coating?" first. Ask what the board experiences, and make sure surface prep is right. The best coating won't save a dirty substrate.

6. What's the actual difference between powder coating and paint?

It's more than the application method—the two are fundamentally different material systems.

Powder coating is a dry, electrostatically charged powder. You spray it onto a grounded part, then bake the part in a curing oven, where the powder melts and cross-links into a tough, uniform film. Paint is liquid—solvent-borne, water-borne, or reactive—and cures through evaporation or chemical reaction.

Because of how it's applied, powder coating produces a thicker, harder, more consistent finish. That's why it dominates metal furniture, automotive wheels, and aluminum extrusion. Paint gives thinner layers, which matters when tolerances are tight or parts need field touch-up.

Color matching is where I see the most expensive mistakes. If your part needs to hit a reference like a Pantone color, the coating's color difference is measured in Delta E. According to Pantone's color matching guidelines, the industry standard tolerance is Delta E below 2 for brand-critical colors. A Delta E between 2 and 4 is noticeable to trained observers.

I still kick myself for a batch we sourced in 2023 where the powder coating hit Delta E 3.6 against the customer's reference. QC rejected it. The re-coat cost $6,000 and two weeks of schedule. We could have avoided all of it by asking one question up front: "What Delta E tolerance does your QC use?"

I won't name the processor that made that batch, but I'll give you the advice for free: confirm the color tolerance before you coat, not after.

7. What should I have ready before placing an urgent coating-material order?

The material is rarely the real bottleneck—the spec is.

When a line is down, I see customers grab anything that might work. That's how a batch gets coated and then fails the performance test. If you're about to make an urgent order, I need three things from you:

The chemistry family. Polyurethane, acrylic, epoxy, silicone—know which one your process is validated for. If you don't know, that's the first problem to solve.

The application method. Spray, dip, brush, electrostatic. The material's viscosity and film formation must match how your line applies it.

A measurable appearance tolerance. Color doesn't have to be "perfect"—it has to be inside the tolerance your QC and your customer agreed to. Give me a Delta E number, not "close enough."

Looking back at hundreds of rush orders across eight years, the ones that failed shared one pattern: an incomplete spec. In 2024, our team processed 47 rush orders with a 95% on-time delivery record. Every success came with a clear specification. Coincidence? No.

If you're in a genuine crisis, call us. Emergency sourcing is part of what we do. But if you show up with a clean spec, the distance between urgent and impossible shrinks fast.